Planooraph co



W. H. GEIGER.

ELEGIRIC SlGNAL.

APPLICATION FILED ml: a. 1915. RENEWED ocr. Is. 1918.

1 .31 0,414. Patented July 22, 1919.

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ELECTRIC SIGNAL arrucmou FILED m1. 8. 19m. RENEWED OCT. I5. 1918.

1,310,414. Patented July 22, 1919.

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W. H. GEIGER.

ELECTRIC SIGNAL.

APPLICATION mm mu. 8. was. RENEWED OCT. 15. ma.

1 ,310,41 4. Patented July 22, 1919.

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UNITED STATES PATENT OFFICE.

WESLEY H. GEIGER, OF WORMLEYSBURG, PENNSYLVANIA.

ELECTRIC SIGNAL.

Continuation in part of application Serial No. 740,565, filed January 6, 1913.

Specification of Letters Patent.

Patented July 22, 1919.

(Forfeited) This application filed January 8, 1915, Serial No. 1,160. Renewed October 15, 1918. Serial No. 258,312.

To all whom it may concern:

Be it known that I, Wnsnnv H. (lumen, a citizen of the United States, residin r at Wormleysburg, in the county of Cum'erland and State of Pennsylvania, have invented certain new and useful Improvements in Electric Signals, of which the following is a specification.

This invention relates to electrical signal ing systems, and forms a continuation of my application, Serial Number 740,565, filed January 6, 1913. Its several features of novelty may be most fully availed of in a system employing both primary and secondary signals interchangeably, as where a primary (for example an audible) signal is called into action by the occurrence of an external condition intended to be indicated and an attendant voluntarily interrupts the signal and replaces it with a secondary (for example a visual) signal after having recognized the intelligence conveyed. But some of its advantages may be realized in a system employing a signal or rimary and secondary signals acting simultaneously, as in an ordinary annunciator or burglar alarm, where no signal is employed for visually continuing the indication of the condition signaled, except the retention by the manually adjusted device, of the position which it assumes in arresting the audible signal.

One feature of the invention consists in so constructing the means em loyed for arresting the signal that it wil enter into engagement with the signal armature, or some part controlled thereby, and retain not only the armature in the arrested position, but

the arresting device as well, and to leave these two members, or set of members, in such relation that when the outside condition indicated by the signal ceases to exist, the parts will be automatically unlatched from arresting position and caught in set position ready to be released by the next signal.

Another object is to employ the arresting member to operate three visual signals. One of these is sin'iultaneous with the audible sig nal set up by the external condition intended to be indicated,- and results from the unlatchingof the armature from the arresting mem ber. Another becomes visible when the arresting member is voluntarily moved to the arrestin position and this signal takes the place 0 the audible and first visual signals,

so as to enable the attendant to observe the continuance of the condition signaled, notwithstanding the interruption of the audible signal. The third signal is used to indicate the intermediate or set position to which the arresting member automatically moved from the arresting position in response to the passing otf of the condition that was signaled and which thus becomes the means of affirmativel indicatin the termination or absence 0' the condition that was signaled. It involves retention of the arresting mem her in its intermediate arresting position, ready to be released automatically when the next signal comes in.

In carrying out this fuller application of the underlying principle of the invention, the arresting member is so mounted that it can assume three distinct ositions, to wit: first, its intermediate position, in which it is held by interlatching with the armature and which is its normal or set position indicating a clear condition; second, one extreme position to which it moves automatically when released by the armature in response -to an incoming signal, and in which it leaves the primary signal free to operate while the arresting member presents to view, a secondary or visual signal of the same meaning; and third, its other extreme position, to which it is voluntarily moved past the intermediate position for the purpose of arresting the primary signal and presenting to view a secondary visual signal of the same meaning, and where it is held by interlatching with the armature until released by the passing of the condition that was signaled when it moves automatically to the intermediate or set position first-named.

'A further feature consists in providing the arresting member with a horn or projection through which it engages a make-andbreak device arranged to control the primary signal.

Further features relate to a secondary switch that is controlled by the arresting member and causedto act as a substitute for or in addition to'the make-and-break device under certain conditions of operation in the preferred embodiments herein selected for purposes'of illustration, as will be more fully explained.

In the -accompanying drawings several embodiments ofthe present invention have been illustrated diagrammatically, and- Figure lshows an electricalarm with both audible and visual signals, and means for silencing the same and automatically resetting it, when the cause for which the signal was given has ceased to exist;

Fig. 2, a modified form of signal intended as a burglar alarm Fig. 3, a three position visual annunciator with an auxiliary audible alarm;

Fig. l, a similar device to Fig. 3, but with a differently arranged circuit for the audible alarm;

Fig. 5 shows my combined annunciator alarm with a normally open circuit and usilng the armature itself as an audible signa Fig. 6, a similar signal to that in Fig. 5, but with a normally closed circuit, and Fig. 7 an elevation of a detail.

Referring now first to Fig. 1, the reference numerals 1 and 2 designate the coils of an electro-magnct buzzer. The armature3 is pivoted on the journal 4 and provided with a shoulder 6. A contact spring 7 having a contact plate 8 near one end, is secured to the pivoted portion of the armature 3, the spring extending beyond that portion and at right angles thereto, constituting a tension member 9, the pressure of which is adjustable by means of a set screw 10.

The adjustable contact screw 11 is adapted to impinge with the contact plate 8 on the spring 7 A rocking arm 12 is journaled on a shaft 13 and provided atone end with a hook 14, which is constructed to engage with the shoulder 6 on the armature 3. The rock-arm 12 has an upward'extension 14* intended to impinge with the free end of the spring 7 and prevent its contacting with the screw 11 when the arm 12 is in the locked position as indicated in the figure, that is when the hook 14 is latched by the shoulder 6 and the apparatus is at rest, the extension 14 engaging with the spring shortly before the hook grips the shoulder 6. At 20 is shown a stop to limit the upward swing of the rock-arm 12, and 21is a push button, held back by a spring. When the rock arm 12 is disengaged from the armature 3 it drops down until stopped by this push button and the arm may again be raised to its position shown in this Fig. 1, by a slight pressure on the push button 21, thus silencing the buzzer. A train A is shown on the track 24 to which a normally closed relay 25 is electrically connected. When energized, this relay closes the circuit of the battery 26 in which circuit the indicator 46, of' a type commonly used on railroads, is inserted. The magnet coils 1, 2 are in the circuit of another battery 26, the current passing over the magnet coils from conductor 27 and out therefrom over conductor 28 leading to the armature journal 4. To complete the circuit one conductor 32 leads from the battery 26 to the armature of the indicator 46, another conductor 29 connects the shaft 13 with the front point 30 of the indicator 46, its rear point 31 connecting with contact screw 11 through the conductor 33. The point 30 controls the resetting circuit and the back point 31 the audible signal.

The operation of the apparatus illustrated in Fig. 1 is as follows: When the train A, going in the direction of the arrow, has passed the points where the conductors are attached to the rails of the track 24. it makes a short circuit between the rails thus opening the relay 2:"). As soon as its armature has dropped, the circuit from battery 26 will be broken and the indicator 46 will give a visual signal. The audible signal will now be given simultaneously, because, as soon as the armature of the indicator 46 drops, it contacts with the back contact point 31, thus closing the circuit to the magnet coils 1, 2. The current then flows from battery 26, through conductor 27, magnet coils 2 and 1, conductor 28, spring 7, then through contacts 8 and 11; the arm 12 being down and finally over conductor 33, contact point 31, conductor 32 back to battery 26. This will cause the armature 7 to vibrate by the action of the make and break contacts 8 and 11 and to give an audible signal. To silence the latter, while the signal 46 still shows, a slight push is imparted to the button 21, thereby raising arm 12 into the upper position, which will push back the spring from contact screw 11, by means of the extension 14. while the hook 14 is gripped by the-shoulder 6 on the armature. As the circuit through 8 and 11 is thereby broken, the audible alarm is silenced no more buzzing taking place. Directly the train A leaves the circuit of track 21, the relay will again close, which subsequently also closes the circuit to indicator 46. The armature of the indicator being thereupon attracted. it will contact with front contact point 30 and close the secondary circuit of battery 26. The current will then flow from battery 26 over conductor 27, magnet coils 1 and 2, wire 28, armature 3 and spring 7 jointly, through arm 12, conductor 29, contact 30 and conductor 32 to battery 26. Directly the magnet now attracts armature 3, arm 12 will be disengaged and assume its free or lower position, and as the circuit is thereby broken, contact 8 will be thrown against contact 11 and the apparatus consequently set automatically in readiness to give new signals fouthe next train.

Fig. 2 represents a burglar alarm. The magnet coils 1, 2, armature 3, spring 7, 9 and contact 8, contact screw 11 and battery 26 with conductors 27 and 28 are all ar ranged as in Fig. 1, with conductor 33" running between the contact screw 11 and the battery 26. With the same side of the battery is also connected one of the wires 32 in the protective circuit, its other wire 29 connecting with shaft 13 of the rocking arm 12. All the doors and windows 0, c 0 are provided with circuit closers which would act on opening any one of them. As before, the rocking arm 12, is provided with a hook 14 for engaging with the shoulder 6 at the end of the armature and a stop 20 and push button 21 are arranged as before. A visual. signal 12" attached to the free end of the rocking arm 12 indicates by its position when the arm has been released, the upright position denoting safety and the inclined position danger.

Should now one of the windows 0 for instance, be opened, the circuit would be closed and the current flow from battery 26 through conductor 27, magnet coils 1 and 2, conductor 28, armature 3 and spring 7 jointly to rock arm, protective wire 29, circuit closer at c and finally through protective wire 32 to battery 26. The magnet cores being thus magnetlzed, the armature 3 will be attracted, disengaging shoulder 6 from. shoulder 14, whereupon the arm 12 with the signal would drop, showing danger. The spring 7 now being free, its contact plate 8 is thrown against the contact screw 11, thereby changing the direction of the current, which will now flow from battery 26, through conductor 27, magnet coils 1 and 2, conductor 28,, spring 7 contacts 8, 11, and conductor 33 back to battery 26. This will cause the armature to vibrate and buzz by the action of the make and break contacts 8 and 11. The vibration, and consequently the audible alarm will continue regardless of the condition of the protective circuit. This means, that the buzzer keeps on 'ving the alarm even if the Window has een opened for but one instant and closed directly. Not until all the doors and windows have been closed and the arm 12 raised into the position indicated in the drawing, by pressing the button 21, will the alarm cease.

In Fig. 3 is illustrated a three-position visual annunciator with an auxiliary bell for the audible alarm. Parts 1 to 10 are the same as described above. The rails of track 24 and the relay arein a normally open circuit which is closed by a train passing over the track. The magnet coils 1. 2 are in the circuit of the battery .26 with the conductors 27, 28 and 29, the latter ending with a contact point 30 for the armature of the relay 25, so that when the relay is energized, the circuit of battery 26 is also energized. As before, the spring 9 tends to hold the armature 3 away from the cores of magnet coils 1, 2, which spring 8, when free, and in order to limit the outward throw of the armature, abuts against the set screw 11 now without electric connection. The head 5 of the armature B is in this case provided with two shoulders (3 and 13, one in front and one in rear in the direction of oscillation of the arn'rature. The rocking arm 12, is again pivoted on shaft 13 and has a stop 20 above and a push button 21 below and a hook 14 with extension 11 for engage ing with shoulder 13 and spring 7 rcspectively. An elbow catch with a hook 113 for engaging with the rear shoulder 6 is pivoted at 17 on the rock arm 12, and provided with a tail piece 17 pressed upward against a stop 19 by a fiat spring 18.

The free end of arm 12 has an arr-irate plate 31 all, its free end divided into three fields or zones, of which the middle one 513 is marked Clear, see Fig. 7, while the upper and lower ones, 32 and 33 respectively, are both marked Train. Facing the plate is a window or sight opening adapted to register with either one of the zones, depending on the position of the arm. Thus in the ready or normal position of the'apparatus, when no train is on the line. the arm 12 stands as shown in Fig. 3 with shoulder 6 engaging hook it and zone 51', that is lear exposed to View in the win (low 35. Similarly, when hook 1G is our gaged by shoulder 6. field 31 is exposed and with the arm 12 free field 32 is exposed, both the latter fields then showing Train.

The arm 12 extends rearward and carries a set screw 23 with insulation 23 at the point. An auxiliary electric bell 55 is inserted in the local circuit of the battery 50, comprising wires -18, 51, 54 and circuit closer 52, 53. The one contact 53 of this circuit closer is formed by a spring, which extends into the path of the set screw 23. the latter being so adjusted that. it will hold the circuit closer open when fields 33 and 31 are exposed, that is, when the armature 3 in engagement with. either hook 14 or 16; and that the circuit is closed, when field 32 is exposed, that is with man 12 free, the bell 55 consequently ringing.

As already described, the apparatus is illustrated in ready position in Fig. 3. Should now a train enter on the track 24, the relay 25 is energized and current then flows from battery 26, over conductor 27, magnet coils 1 and 2, conductor 28', relay armature and contact 30 back to battery 26 over wire 29. The armature 3 will then be attracted by the cores of magnet coils 1. 2, thereby releasing rocking arm, 12, which will drop down and show train position 32 in the window 35 instead of the clear position 56. Directly arm 12 has dropped, set screw 23 releases contact spring 53, which immediately closes the bell circuit. starting the bell 55 ringing, as the circuit flows from battery 50, over wire 51, circuit closer 52, 53, Wire 54, bell 55, and wire 48 back to battery 50. To silence the audible alarm, the arm 12 is raised to its uppermost position, by means of the push but-ton 21, hook 113 cngagln with shoulder 6*, while held 34, that is rain is shown in the win- (low and the contact 52and 53 are opened by screw 23, which breaks the circuit and immediatcly stops the bell 55. Directly the train has left the track 24, the relay armature drops away from contact 30", breaking the circuit and releasing the armature 3, which then swings away from hook 1(5 and instead engages with book H on the dropping of the rock arm 12. The apparatus has thus been automatically reset to "position Clea-1".

In Fig. 4 is illustrated an arrangement similar to the one shown in Fig. 3 but with a diifercntly arranged auxiliary bell. Parts 1 to 28 are the same as already described. with the difference that set screw 23 is not necessary in this case, the contact screw 1.1 being instead, utilized for making the electrical connection in the circuit of the auxiliary bell 55 and its battery 50, the wires 33, 48 and 23 completing the connection between the contact screw 11 and the contact plate 8. The circuit for the magnet coils 1, 2 is a normally open one, comprising as before the conductors 27 and 28 between battery 26 and magnet coils 1 and 2 and from the latter to the journal 4 of the armature 3, respectively. From the rockarm shaft 13 conductor 29 leads to the fulorumed end of the armature of the relay 25, the contact point 30 for its free end connecting with battery 26 by means of conductor 30.

When a train enters on track 24, it closes the circuit of the relay 25, thereby lifting its armature into contact with point 30", which then closes the circuit of the magnet coils 1. 2, the rocking arm 12 having been previously set in the clear position by pressing push button 21. The current will now flow from battery 26 over conductor 27, magnet coils 1, 2, conductor 28, then simultaneously over armature 3 and spring 7 to arm 12, conductor 29, relay armature and contact 30 and finally over conductor 30 back to battery 26. The magnet coils 1, 2, now being energized, will attract armature 3, disengaging shoulder 6 from hook 14 and the rocking arm 12 now being free to drop, the central or clear zone 56 will disappear and be replaced by the upper train zone 32 in the window 35. Simultaneously spring 7 is released by rocking arm extension 14, so that contact plate 8 will be thrown against contact screw 11, which thus closes the circuit of the auxiliary alarm bell 55. The current in this circuit then flows from battery 50, over wire 48, bell 55, wire 33, contacts 11 and 8, spring 7 and wire 28 backto battery 50.

Should it now be desired to silence the bell while still continuing the visual warn ing signal, all that needs to be done is to press button 21, thereby raising arm 12 from its lowermost to its topmost position, when zone 34, which is also marked Train will be Visible in window 35. The rocking a'rm 12 will now be held in position by hook 16 and shoulder 6 instead of by the locking device 14, 6 as before, and the spring 7 will be pushed back from. the contact screw 11, thus breaking the auxiliary circuit. The magnet circuit is thus again closed, permitting the current to flow from battery 26, conductor 27, magnet coils 1, 2, conductor 28, spring 7 and extension 14 as well as over armature 3 and hook 16, to rocking arm 12, conductor 29, relay armature contact 30 and finally conductor 30 backto battery 26.

Directly the train has passed the track 24-, the relay circuit is broken and the Contact at 30 is opened. Consequently magnet coils 1, 2 no longer attract the armature 3, which thereupon disengages hook 16, letting arm 12 drop, but only to its central. position, showing zone 56, or Clear, in window 35, because shoulder 6 on the armature 3 directly engages with hook 1 1 on the rocking arm 12, while the spring 7 is still held back from the contact screw 11 by the extension 14 and the auxiliary bell circuit is held open.

Referring now to Fig. 5, the same reference numerals designate the same parts as in the preceding figures.

The conductor 29 connects the Contact screw 11 with a; fulcrum end of the relay armature and another conductor 30 connects the battery 26 with the contact point 30 for said armature. Another conductor 29 leads from the rocking arm shaft 13 to spring contact 36 and also to the conductor 29 and the contact point 37 is connected with magnet coil 1 by means of the conductor 38. As shown in this figure the magnet circuit is a normally open one and the operation is as follows: When a train enters on track 24:, relay will attract its armature which will then close the contact at 30". As a consequence, the current will now flow from battery 26 through conductor 27 magnet coils 1 and 2 through conductor 28 and simultaneously through armature 3 and spring 7, rocking arm 12 from whence it continues through conductor 29, thence to conductor 29 and through relay contact 30 to battery 26. The magnet coils 1', 2 will thereupon attract armature 3 and release rocking arm 12, disengaging shoulder 6 from hook 14, thereby throwing zone 32 inline' with window 35, at the same time permitting contact to be made between contact points 8 and 11 forming a makeand brea'k contact, 'Which will Vibrate the armature so that itgives anaudible signal. This vibretimr may be stopped and the buzzer silenced by means of the slight pressure on the button 21, thereby raising the rocking arm 12 until zone 34 is in line with window 35 and hook 16 engages with shoulder 6*. Set screw 23 will then close contacts 36 and 37 and extension 14 of the rocking arm 12 will impinge with spring 7 opening the contact between points 8 and 11. The current will now flow from battery 26- over conductor 27, magnet coils 1 and 2, conductor 40, shunt coils 1 and 2, conductor 38, contacts 37 and 36 forming a shunt circuit from the current flowing through armature 3 and hook 16 to rocking arm 12, which is now in the attracted position, the springs 7 to 14*, thereupon through conductor 29, conductor 29, relay contact 30 and conductor 30 back to battery 26. Hook 16 will now be engaged by shoulder 6 and bring signal zone 34, which is Train, in line with the window 35. This now shows that the train is still on the section of the track that operates relay 25, although the buzzer has been silenced through the engagement of the extension member 14* and spring 7. When the train is clear of its section, relay 25 will open the circuit flowing through the magnet coils 1 and 2 which will release the armature 3, disengage hook 16 from shoulder 6, shoulder 6 of armature 3 instead engaging with hook 14 of rocking arm 12, and extension 14 will now engage with spring 7 and hold it away from contact screw 11.

The embodiment illustrated in Fig. 6 is similar to the one shown in Fig. 5 w1th the difference that the circuit for the magnet is normally closed. Parts 1 to 23 are the same as described in the preceding figure. The contact screw 11 connects with the contact member 52 by means of the conductor 51 and the contact 53 connects with the battery 61 by means of a conductor 54, resistance 75 and conductor 76. The other side of battery 61 connects with coils 2 and 1 by means of conductor 63 of the magnet and the conductor leads from these coils to the journal a of armature 3, the coils also being provided with a shunt wire 64. From conductor 70 another conductor 65 leads to the visual indicator 66 of the usual kind employed in railroads, and conductor 67 leads to conductor point 74 for the armature of one of a pair of relays 68 which armature connects with the contact point 73 of the armature of the other one of said two relays 68. From there the conductor 69 leads back to battery 61. The two relays 68 are in close circuit with the rails of tracks B and C.

The apparatus shown in Fig. 6 operates as follows: With the magnet circuit closed at 73 and 74, the relay 68 being in operation, the current will flow from battery 61 over conductor 63 tothe inner coils of magnet 2 and 1, conductor 64, outer coils of magnet 2, 1, conductor 65 to indicator 66, conductor 67, contacts 74, 73 and conductor 69 back to battery. This will energize magnet coils 1, 2 and hold the armature to its cores. Should now a train arrive on the track circuit B or C, thereby shunting one or both relays 68 and opening their contacts 73 and 74 with conductors 6t, 65, the mag net coils 1, 2 will be deenergized, whereupon the armature 3 is released, disengaging hook 15, which, in this case, extends above hook 14, from shoulder 6 of the armature 3 and rocking arm 12 so that it will show zone 32 in the window 35, whereupon contact will be made between contact plate 8 of spring 7 and contact screw 11, thus closing the local circuit through conductors 51, 52, 53, 54, resistance 75 and conductor 76 to battery 61. This will cause the armature 3 to vibrate and give an audible signal which will continue until the train is clear of the relay circuit B and C. If, however, it should be desired to stop the audible signal while the train is still shunting the relays 48, this may be accomplished by pressing button 21, thereby elevating the rocking arm 12 and bringing the hook 14 into engagement with shoulder 6 of the armature 3 and showing zone 34 with Train warning in Window 35, whereby the armature 3 is arrested and held in central or non-buzzing position and prevented from making contact between points 8 and 11, and also opening contacts between contact members 52 and 53. In other words only a visible but no audible signal is given. After a train has passed, the relays 68 are again closed and the armature 3 will be attracted, thereby releasing hook 141 from shoulder 6 and permitting the rocking arm 12 to drop until hook 15 interlocks with shoulder 6* as shown in Fig. 6, thus exposing zone 56 showing Clear in window 35.

It will now be evident that the arrange ment illustrated in Fig. 5, as well as that illustrated in Fig. 6, provides an audible warning, that is, both audible and visible, when zone 32 marked Train registers with Window 35, or in other words with rocking arm 12 in its lowest position, and the armature 3 free. With the signal zone 56, that is Clear, registering with the window 35, rocking arm 12 stands in its middle position arresting armature 3 by means of one of its hooks. With signal zone 34, Train opposite window 35, only a visible warning is given and no audible one, when rocking arm 12 is situated in its uppermost position arresting the armature 3 with the shorter one of its hooks, thus preventing any buzzing, although the magnets are energized.

I claim 1. In a signaling device, the combination of an electromagnet, an armature therefor,

a contact spring carried by said armature, a contact point for said s ring, and a movable arm constructed to latcli with said armature and having an extension which engages the contact spring and shifts the position of said spring relatively to its contact point when the movable arm is in latching relation with the armature.

2. I11 a signaling device, the combination of an clectromagnet, an armature therefor, a contact spring controlled by said armature, a contact for said spring, a movable arm constructed to latch with the armature in each of two difi'erent positions of the movable arm and also having ,a third position assumed when released by the armature, a pair of contacts, and operating means for said contacts carried by theniovable arm and adjustable to operate said contacts in one of the three movable positions of the arm.

In a signaling device, an electromagnet having a vibratory armature and a signal arm having a definite path of moven'ient relatively to the armature, said armature and signal arm being constructed for interengagement at two spaced points in said path of movement, whereby the armature is adapted to arrest the signal arm and be arrested thereby in either ,of two independent signaling positions; said armature by its opposite movements releasing the signal arm from the said points of engagement successively; said signal arm when released from the second point of engagement being adapted to assume a third signaling position, and said signal arm being adapted'to impart three distinct signals by its respective positions.

4. In a signaling device, an electromagnet having a vibratory armature and a signal arm having a definite path of movement relatively to the armature, said armature and signal arm being constructed for interengagement at two spaced points in said path of movement, whereby. the armature is adapted to arrest the signal arm and be arrested thereby in, either of two independent signaling positions; said armature :by its topposite movements releasing the signal arm from the said points of engagement successively; said signaliarm when released from the second point of engagement beingadapted to assume a third signalingposition, and said signal arm being adapted to impart three distinct signals by its respective positions; and a signal-controlling make-and break actuated by the signal arm when. at one of its signaling positions.

5. In a signaling device, an electromagnet having an armature and a signalarmhaving a definite path of movement relatively to the armature, said armature and signal arm being constructed for inter-engagement at two spaced points in said path of movement, whereby the armature is adapted to arrest the signal arm and be arrested thereby ineithoiyof two independent signaling positions; said armature by its opposite movements releasing the signal arm from the said points of engagement successively; said signal aran when released from the second point of engagementwbeing adapted to asume a third signaling position, and said signal arm being adapted to impart three distinct sig nals by its respective positions; an auxiliary signal and a sigl'ial-controlling make-andbreak actuated by the signal arm when at one of its signaling positions, and released, by: the removal of the signal arm from such position to arrest the auxiliary signal developed by said make-and-break; the visual signal presented by the signal arm by such last-named movement being equivalent to the auxiliary signal that was arrested by such movement.

(3. In an alarm, the combination with an electromaggiet, an armature therefor, a contact spring carried by said armature, a con tact point for said spring, and a movable arm constructed to latch with said armature. of an extension on said movable arm to make contact with said contact spring and hold it out of engagement with said contact point when said movable arm is in latching positionwith the armature.

7. In an alarm, the combination with electromagnets, an armature therefor, an electric contact spring mounted on said armature, an electric contact point for said spring, of a movable arm. constructed to engage with said armature and an extension on said arm .adapted to engage with said contact spring simultaneously with an engagement between said armature and said arm.

Inan annunciator alarm, the combination with eleetromagnets, an armature therefor, of a pivotally mounted arm provided with latching means and constructed to have one free and twowlatching positions, means to move said arm into latchingengagement with the armature arresting the latter and hold said arm in either one of two predetermined positions in engagement with the armature, and an indicator carried at one end of said arm.

9. Inan annuneiator alarm, the combination with eleetro-magnet coils, an armature therefor, a spring contact carried by said armature, of an arm pivotally mounted near one end, ,a hooked arm integral with said pivot arm constructed to engage the armature and hold saidiarmature in a predetermined position, a double armed member pivotally mounted on said pivoted arm. one arm of which is provided with a hook constructed toengage the armature and hold it in a second predetermined position, a spring constructed to engage the under face of the second arm and a stop to limit the forward movement of said second arm.

10. In an annunciator alarm, the comhination with ehactroniagnet coils, an armature therefor, and a contact spring carried by said a rn'iature, of a contact point for said spring, a signal arm pivotally mounted, said arm having latching means for giving it two latching positions relative to said armature and one free position, means to move said arm into latching engagement with the armature thereby arresting said armature in one of said latching positions and holding it and said contact spring out of engagement with said contact point for said spring and contacts arranged to be operated by said arm when moved into one of said latching positions with the armature, a visible signal carried by said signal arm, an extension on said arm adapted to engage with said contact spring simultaneously with the engagement between said armature and sa id arm.

11. In an annunciator alarm the combina tion with electron'iagnet coils, an armature therefor, an electric contact spring carried by said armature, a contact point for Said spring, of a signal arm pivotally mounted. and provided with mcans for interlocking with said armature, and means to move said arm into either one of two interlocking positions with said armature, thus arresting both said armature and arm; said arm having three visual signals which are respectively brought into view when said arm is in its Free position or in either of its locked positions.

12. In an annunciator alarm the combination with electromagnet coils, an armature therefor, a contact spring carried by said armature, a contact point for said spring, of a signal arm pivotally mounted, a pair of hooks of different length on said arm construeted to engage with said armature thereby arresting the armature and giving the arm two different locking positions, three visual signals on said arm, said visual signals being respectively brought into View when said arm is in its free position or in either of its locked positions.

13. In an annunciator alarm, the combination with electromagnet coils, an armature therefor, a contact spring carried by said armature, a contact point for said sprmg, of a signal arm pivotally mounted and provided with latching means for said armature, and means to move said arm into latching engagement with the armature, thereby arresting said armature; a main circuit for said magnet coils having a power source and a circuit closer; an auxiliary circuit fed by the same power source; said contact point controlling the one and said pivoted arm controlling the other of said circuits.

14. In an alarm, the combination with an elcctromagnct, an armature therefor, a contact spring carried by said armature, a contact point for said spring, and a movable arm provided with latching means to latch with said armature, an extension on said arm to hold the armature or contact spring out of engagement with said contact when latched with the arn'lature.

15. In a signaling device, a nuke-amt break device, an armature controlling same, an clectronmgnet adapted to control the armature, and a deteut constructed for latching with said armature, said make-andbreak device comprising a spring on said armature and a contact point for said spring, said detent having a projection for engaging with said spring to break the con-- tact between said spring and said contact point, said engagement. taking place anterior to the detent latching on moving into latching position.

16. In a signaling device, a make-andbrcak device, an armature controlling same. an clectromagnet adapted to control the armature, and a detent constructed for latching with said armature, said niak -and-breal device comprising a spring on said armature and a contact point for said spring, said detent having a projection for engaging with said spring to break the contact between said spring and said contact point shortly after the release of said detent when said magnet is first energized.

17. In a signaling device, the combination of an electromagnet, an armature therefor, a contact spring carried by said armature, a contact point for said spring, and a movable arm constructed to latch with said armature and having an extension which engages the contact spring and shifts the position of said spring relatively to its contact point shortly before the engagement between the armature and said arm, when said arm is moving into such engagement.

18. In a signaling device, the combination of an electromagnet, an armature therefor, a contact spring carried by said armature, a contact point for said spring, and a movable arm constructed to latch with said armature and having an extension which engages the contact spring and shifts the position of said spring relatively to its contact point shortly after the release of said arm from said armature, when the latter is being first attracted by the magnet.

The foregoing specification signed at Lemoyne, Pat, this eighteenth day of December, 1914.

WESLEY H. GEIGER. In presence of J. W. ARMSTRONG, \VM. C. SHERMAN.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner 0! Patents. Washington, D. G. 

